涌流的

This figure shows that the E 譈 current is by far the most significant portion of the azimuthal current.

这一个身材表示 E 譈涌流是方位角涌流的显然最重要部分。

The amplitude of the circulating bearing current depends on the common mode component of capacitive coupling currents.

循环举止涌流的广阔仰赖电容的联结涌流的通常模态成份。

It identifies the fact that unbalanced currents flow in the two coil sides of a motor winding due to distribution of capacitive coupling currents.

它识别事实「由于电容的联结涌流的分配不平衡的涌流在马达卷绕的这二卷边中流动」。

Extracted the characteristics of excitation inrush current to establish a new identification method. This method has strong robustness for TA saturation, theoretical analysis and MATLAB simulation experiments indicated that the principle will not be affected by the TA saturation,*** and effective, and avoided the faults that hardware requirements of high and computation in the method of traditional accurate measuring the dead angle of excitation inrush current.

提取励磁涌流的特征量，并以此建立识别励磁涌流的新方法，该方法对TA饱和具有很强的鲁棒性，理论分析和MATLAB仿真试验均表明该原理不受TA饱和的影响，简单有效，避免了传统精确丈量励磁涌流中断角的方法对硬件要求高及运算量大的缺点。

According to the mechanism of producing transformer excitation surge current caused by saturation of transformer core, the paper put forward a kind of method to discriminate excitation surge current and short-circuit current adopting calculation of equivalent instant excitation inductance average value.

从变压器励磁涌流的产生是由于变压器铁心饱和这一原理出发，提出了一种利用计算等效瞬时励磁电感平均值来区分励磁涌流与短路电流的方法。

In chapter six, two novel methods of distinguishing magnetizing inrush current have been studied.

第六章研究了两种鉴别变压器励磁涌流的新方法。

The magnetizing inrush current is harmful to power transformer ,and even more sometimes it is so high that it can cause misoperation of power transformer protection device.

励磁涌流对变压器绕阻的机械稳定性和绝缘强度危害很大，还会导致变压器保护的误动作，因而变压器励磁涌流的研究是变压器保护领域的一个重要课题。

Which magnitude is smaller and which sign is negative.

该原理不受励磁涌流的影响，EMTDC仿真验证了其可行性。

According to the analysis of reasons of transformer mal-operation in Pingdingshan Electric Power Bureac for years , and according to the present situation of transformer protection studies and applications at home and abroad. This paper points out the shortcomings of discrimination between internal faults and magnetizing inrush, the problems existing in differentiating the slight faults of turn-to-turn in transformer are also advanced. On the base of the electromagnetic characteristics of transformer, the relations between fluxional differential current and voltage of source side analyzed, all the operating states of transformer simulated by EMTP/ATP, the criterion of magnetizing inrush in transformer is got. Through the wavelet analysis of current waveform, using the intense reaction of wavelet transform to the little change of signal, the internal faults of transformer are distinguished by testing local extremum.

本文根据平顶山市电业局历年来变压器保护误动的原因分析，并根据国内外变压器保护使用和研究的现状，指出了现有变压器保护在区分变压器励磁涌流和内部故障方面以及在判断变压器匝间轻微故障方面存在的问题和不足；从变压器电磁特性出发，分析了电源侧电压和电流微分之间的关系，利用电磁暂态仿真程序对变压器各种运行状态进行了仿真，并以此建立了判断变压器是否含有励磁涌流的判据；通过对电流波形的小波分析，利用小波变换对信号微小变化极强的反映能力，通过检测电流的局部极值点来区分变压器运行状态，并作为上述判据的补充。

An improved wavelet packet algorithmis introduced. Inrushes under different conditions can be identified form different kinds of internal fault on power transformers using the WPA. Simulation results show that correct identification of the inrush can be made with half-cycle sampled data under all kinds of condition.

其中包括：提出利用小波变换对变压器励磁涌流和各种内部故障进行时域分析，构造了一种基于小波包变换的识别变压器励磁涌流的快速算法；设计了一种基于正交小波变换的电力系统振荡与故障的快速识别算法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。